1. Toward an axis, as in a sunflower; the oldest flowers are near the edge, the youngest in the centre

See also: centripetal

• signify
• signing
• signior
• signor
• signora
• signore
• signorina
• signory
• signpost
• Sigrid Undset
• Sigurd
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• Sihasapa
• sika
• sike
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• Sikhism
• Sikkim
• Sikorsky
• silage
• silane
• sild
• sildenafil
• sildenafil citrate
• silence